[marcoleo]

Dear all,
I'm new to ZJ (bought yesterday '93 4.0L) today during overall checking I've discovered that the front diff has no ring inside!!
Due the fact the pinion bearing are bad I think to swap in a D30HP from 89XJ; I would like to keep original ZJ axle shaft (donor has no abs) knuckle rotor etc, basically everything a part diff and axle itself.-
Anyone has already try do this?
My donor axles has 3.55 gear, searching seems also my new ZJ has the same gear, anyone confirm?
THX, Marco

 

[SOLITUDE]

Swapping in an HP Dana 30 is a direct bolt in.

I would keep the XJ shafts because they are u-jointed and are stronger. If your ZJ came from the factory with a tow package then you have 3.73's. If it didn't come from the factory with one then you have 3.55's. Look at the metal tag and see if it's stamped with 3.55 or 3.73's. If you can't tell, take a picture and post it, we'll tell you.

My guess would be you have 3.55's. Swap in the XJ 30, you won't regret it.

 

[marcoleo]

thx for the quick answer!
I've the tow package but I don't think it come from factory, tomorrow I remove the dirty&rust to see if I can read the gear ratio.
I know the XJ joint are stronger, but I prefer to keep the ABS due the ZJ is for my wife 4 daily driving, I will add a smal 3-4" lift and no offroad...... for the moment :lol:
Do U think the viscostatic coupluer of the 249 was damaged by the driving without front shaft & and missing differential? Maybe a stupid question but is the first time I see this kinda of TC usually I play with 231-242

 

[SOLITUDE]

Short Answer - Probably.
Long Answer - Yes.

http://www.nagca.com/forum/viewtopic.php?t=25784

 

[marcoleo]

mmm maybe during the works I will put on my spare 242, but I guess to have spline problems my 242 is an '89 with 21.... the newer I guess 23

 

[SOLITUDE]

yup.
http://www.nagca.com/forum/viewtopic.php?t=26048

 

[marcoleo]

very good write up... i've to learn a lot here

 

[marcoleo]

well I've check the gear ratio and it matching; so now the question is, in order to use shaft, rotor, hub & brake from the ZJ I've to change also the Knuckles?
If yes anyone know if the studs are compatible?

 

[RiPPiNiTuP7]

well I've check the gear ratio and it matching; so now the question is, in order to use shaft, rotor, hub & brake from the ZJ I've to change also the Knuckles?
If yes anyone know if the studs are compatible?

knuckles are completely swappable.

 

[marcoleo]

thanks, very good I've the work for next weekend!

 

[RockZJ]

umm...I heard that CV's are stronger...they can handle more ft lbs of torque but dont last as long, is that true? I saw it on Trucks!

RockZJ

 

[marcoleo]

personally is the first time that I've a jeep with CV, all my XJ with u-joint, usually I replace every 40-50,000Km for few $ also if them working fine and I never had problems; I don't know the cost and the work to replace a CV

 

[RockZJ]

65 bucks usually (eBay special) and same as a u-joint style one. Its a joke really,

RockZJ

 

[marcoleo]

I've to improve my english......

 

[RockZJ]

yes I agree, but hey your trying!

RockZJ

 

[RockZJ]

see and I want to learn Italian...go figure.

RockZJ